If you've taken delivery of it and are immediately thinking of sticking with the prophet and buying a boat then it sounds like the jekyll is not setting your heart racing?
Personally I'd be really keen to get it ridden as I think it looks like a potentially great bike - The prophet is a great bike too, though, and rowing boats don't grow on trees. Hard to say without knowing more about where you are with your riding atm.
You'd probably clear a grand for the new frame I would have thought? Not seen what they're going for on the bay.